Among the many aspects in which gender inequality manifests itself, sexism behaviors appear almost inadvertently daily. From personal life situations to workplace scenarios, sexism behaviors have an impact that is largely overlooked. Despite its relevance, there is still a need for tools to effectively educate about this issue. We consider that serious games are an innovative and effective tool to address social issues, making them visible and increasing players’ awareness and reflection about them. In this paper, we present “La Entrevista” (“The Interview”), a serious game to address sexism, particularly in the workplace, aimed at young adults. We detail the design process of the game, based on common sexism situations and behaviors, as well as exploratory user interviews with 10 engineers. Then, we describe two initial formative evaluations of the game: (1) an evaluation of an early prototype with 17 school teachers to gather their opinion and feedback; and (2) an initial formative evaluation of the game with 32 Red Cross Youth volunteers to obtain their opinion about the final game version. The positive results of these early evaluations, as well as the improvements pointed out by participants, have helped us to refine the final version of the game. Hereafter, we prepare its application with target users and the inclusion of learning analytics to capture players’ actions while playing to better measure the game impact.